Skin-friendly moisture-permeable multifunctional fabric and preparation method thereof

Abstract

The invention discloses a skin-friendly and moisture-permeable multifunctional fabric and a preparation method thereof, and belongs to the technical field of multifunctional fabrics. Comprising a skin-friendly inner layer and a waterproof and moisture-permeable outer layer. Three kinds of fibers of the skin-friendly inner layer achieve a synergistic effect, the soft touch feeling is provided, the friction coefficient is low, and skin irritation is reduced; the PTFE microporous membrane in the waterproof and moisture permeable outer layer is compounded with the functional polyester fiber, so that the moisture permeability is excellent, and the microporous structure is stable; the functional auxiliary agent is prepared through a Schiff base reaction and a quaternization reaction, broad-spectrum antibiosis is achieved through triple action targets, the antibacterial property of the fabric is greatly improved, the surface resistivity is remarkably reduced through the quaternary ammonium salt component, and the antistatic performance is excellent; therefore, the prepared fabric is skin-friendly and moisture-permeable, has antibacterial and antistatic properties, and has important application value in the technical field of multifunctional fabrics.

Description

Technical Field

[0001] This invention belongs to the field of multifunctional fabric technology, specifically relating to a skin-friendly and breathable multifunctional fabric and its preparation method. Background Technology

[0002] As people's living standards continue to improve and their awareness of health and environmental protection grows, consumers' demands for textiles have gradually shifted from basic functions of warmth and coverage to a diversified pursuit of comfort, functionality, and environmental friendliness. This is particularly true in areas such as intimate apparel, sportswear, and medical protective equipment, where higher requirements are placed on the skin-friendliness, breathability, and multifunctionality of fabrics.

[0003] First, in terms of moisture permeability, ordinary fabrics have poor moisture permeability. The human body continuously produces sweat during activities. If the fabric cannot timely wick away the sweat and dissipate it into the external environment, the sweat will accumulate between the skin and the fabric. This will not only cause the wearer to feel stuffy and sticky, but may also lead to skin problems such as eczema and prickly heat, affecting human health.

[0004] Secondly, in terms of skin-friendliness, ordinary fabrics are not very skin-friendly. When skin comes into contact with ordinary fabrics, it will cause friction, especially in sweaty or humid environments. Furthermore, the fabric will absorb water and expand, further increasing the friction with the skin, leading to discomfort when worn.

[0005] Finally, while traditional natural fibers such as cotton and linen possess excellent moisture absorption, breathability, and skin-friendliness, they also suffer from drawbacks such as being prone to wrinkling and difficult to care for. Synthetic fibers, such as polyester and nylon, while exhibiting superior strength and durability, have poor moisture-wicking properties, are prone to static electricity, and offer less comfortable wear. Furthermore, in daily life, people are exposed to various bacteria, viruses, and other microorganisms. If fabrics lack antibacterial properties, they can easily become breeding grounds for microorganisms, posing a potential threat to human health. More importantly, conventional fabrics typically offer only one function, failing to meet the demands of modern consumers for multifunctional fabrics. Therefore, there is an urgent need to invent a fabric that is skin-friendly and breathable, while also possessing antibacterial and antistatic properties, to meet the higher requirements of the fabric technology field. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a skin-friendly and breathable multifunctional fabric and its preparation method.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A skin-friendly and breathable multifunctional fabric comprising a skin-friendly inner layer and a waterproof and breathable outer layer.

[0009] As a further technical solution, the skin-friendly inner layer comprises the following raw materials in parts by weight: 43-55 parts long-staple cotton fiber, 21-33 parts modal fiber and 10-18 parts seaweed fiber.

[0010] The long-staple cotton fiber in the skin-friendly inner layer of this invention has an excellent soft touch. Its long and thin fibers are strong, giving the fabric good skin-friendliness, making it comfortable and natural when in contact with the skin and reducing friction and irritation. It also has good moisture absorption, which can quickly absorb sweat from the skin surface and keep it dry. Modal fiber is made from natural wood pulp through a special spinning process. It has a soft and smooth feel and better moisture absorption than cotton fiber. It can quickly absorb and release moisture, keeping the skin comfortable at all times. Seaweed fiber contains rich minerals and trace elements, has good antibacterial and bacteriostatic properties, can effectively inhibit bacterial growth, and keep the fabric clean and hygienic. It also has a certain moisturizing effect, which can keep the skin hydrated and further enhance the skin-friendly feel.

[0011] As a further technical solution, the skin-friendly inner layer is prepared through the following steps:

[0012] Step A1: Open and remove impurities from long-staple cotton fibers, modal fibers and seaweed fibers respectively to improve the purity and spinnability of the fibers and obtain pretreated fibers.

[0013] Step A2: Place the three pretreated fibers into a blending equipment and mix them thoroughly to obtain a skin-friendly inner layer blended fiber.

[0014] Step A3: The blended fibers are spun into yarn through a spinning process, and then the yarn is woven using weaving equipment to obtain a skin-friendly inner layer.

[0015] As a further technical solution, the waterproof and breathable outer layer is prepared by the following steps:

[0016] Functional polyester fibers are combed and stretched to make their fiber arrangement more neat, improving the strength and uniformity of the fibers. Then, a hot-pressing composite process is used to combine the treated functional polyester fibers with a polytetrafluoroethylene (PTFE) microporous breathable membrane, so that the breathable membrane and the fibers are tightly bonded to form a waterproof layer, resulting in a waterproof and breathable outer layer.

[0017] As a further technical solution, the polytetrafluoroethylene microporous breathable membrane is prepared by the following steps:

[0018] Polytetrafluoroethylene resin is mixed with a lubricant and extruded through a plunger to obtain a preform. The preform is then biaxially stretched to form a microporous structure, followed by sintering to remove the lubricant and stabilize the pore structure, resulting in a polytetrafluoroethylene microporous breathable membrane.

[0019] As a further technical solution, the lubricant is one of paraffin wax and epoxidized soybean oil.

[0020] As a further technical solution, the mass ratio of the polytetrafluoroethylene resin to the lubricant is 8:2-3.

[0021] As a further technical solution, the sintering temperature is 340-380℃.

[0022] PTFE microporous membrane is a porous film made through a special process. It has waterproof and breathable properties. When used as a waterproof and breathable outer layer, it can give fabrics breathable properties.

[0023] As a further technical solution, the functional polyester fiber comprises the following raw materials in parts by weight: 73-85 parts polyethylene terephthalate, 3-5 parts antioxidant, and 4-12 parts functional additives.

[0024] As a further technical solution, the antioxidant is one of antioxidant 1010 and antioxidant 1076.

[0025] As a further technical solution, the functional additive is prepared through the following steps:

[0026] B1. In a three-necked flask, 4-pyridinecarboxaldehyde, 4,4'-azodiphenylamine and toluene are mixed and stirred evenly. Then, hydrochloric acid solution (mass fraction 12%) is added dropwise to adjust the pH of the reaction system to ≈4-5. The apparatus is then heated to 60-65℃ and kept at this temperature for 4-6 hours until the reaction is complete. After post-processing, the initial product is obtained.

[0027] B2. In a three-necked flask, the primary product, iodomethane, and toluene are mixed and stirred until homogeneous. The apparatus is then heated to 70-75°C. At this temperature, the mixture is refluxed for 6-8 hours until the reaction is complete. After post-processing, the functional additive is obtained.

[0028] The chemical formula of the primary product prepared in step B1 is as follows:

[0029]

[0030] As a further technical solution, the ratio of the amounts of 4-pyridinecarboxaldehyde, 4,4'-azodiphenylamine, and toluene in step B1 is 23.7g:21.2g:120mL.

[0031] As a further technical solution, the ratio of the amount of initial product, potassium iodide and toluene in step B2 is 39.1g:28.3g:150mL.

[0032] Regarding the preparation process: In step B1 of this invention, two moles of 4-pyridinecarboxaldehyde react with one mole of 4,4'-azodiphenylamine to form a Schiff base reaction, thus preparing the initial product. Then, the product is quaternized with iodomethane to finally obtain the functional additive.

[0033] Regarding performance, the functional additives prepared in this invention contain azobenzene, Schiff base and quaternary ammonium salt to achieve highly efficient antibacterial effect through triple action target, while quaternary ammonium salt can significantly improve the antistatic properties of the fabric.

[0034] As a further technical solution, the functional polyester fiber is prepared through the following steps:

[0035] After drying, polyethylene terephthalate is added to a twin-screw extruder along with antioxidants and functional additives. The mixture is then melt-spun in the twin-screw extruder to obtain functional polyester fibers.

[0036] This invention also provides a method for preparing a skin-friendly and breathable multifunctional fabric, comprising the following steps:

[0037] The fabric is laminated using a lamination process to combine a skin-friendly inner layer with a waterproof and breathable outer layer. During the lamination process, polyurethane adhesive is used to evenly coat the bonding surfaces of the skin-friendly inner layer and the waterproof and breathable outer layer. Then, the two layers are hot-pressed together using a hot press roller to firmly bond them together, forming a double-layered, skin-friendly, and breathable multifunctional fabric.

[0038] As a further technical solution, the hot pressing temperature is controlled at 150-170℃, the pressure is 0.2-0.4MPa, and the time is 5-8s.

[0039] The beneficial effects of this invention are:

[0040] Advantage 1: The three types of fibers in the skin-friendly inner layer of this invention work synergistically to provide a soft touch, low coefficient of friction, and reduce skin irritation;

[0041] Advantage 2: The PTFE microporous membrane composite functional polyester fiber in the waterproof and breathable outer layer of this invention has excellent moisture permeability and stable microporous structure;

[0042] Advantage 3: Functional additives were prepared through Schiff base reaction and quaternization reaction, achieving broad-spectrum antibacterial effect through triple action targets, which greatly improved the antibacterial properties of the fabric. In addition, the quaternary ammonium salt component significantly reduced the surface resistivity and had excellent antistatic properties.

[0043] Therefore, the fabric prepared by this invention is skin-friendly and breathable, and also has antibacterial and antistatic properties, which has important application value in the field of multifunctional fabric technology. Detailed Implementation

[0044] To make the technical problems, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Example 1

[0047] Functional additives are prepared through the following steps:

[0048] B1. In a three-necked flask, 23.7 g of 4-pyridinecarboxaldehyde, 21.2 g of 4,4'-azodiphenylamine, and 120 mL of toluene were mixed and stirred until homogeneous. Hydrochloric acid solution (mass fraction 12%) was added dropwise to adjust the pH of the reaction system to ≈4. The apparatus was then heated to 60°C and kept at this temperature for 4-6 hours until the reaction was complete. After post-processing, the initial product was obtained.

[0049] B2. In a three-necked flask, 39.1g of the initial product, 28.3g of iodomethane, and 150mL of toluene were mixed and stirred until homogeneous. The apparatus was then heated to 70°C. The mixture was refluxed at this temperature for 6 hours until the reaction was complete. After post-processing, the functional additive was obtained.

[0050] Functional polyester fibers are obtained through the following steps:

[0051] After drying 73g of polyethylene terephthalate, it was added to a twin-screw extruder along with 3g of antioxidant 1010 and 4g of functional additives. The mixture was then melt-spun in the twin-screw extruder to obtain functional polyester fibers.

[0052] Example 2

[0053] Functional additives are prepared through the following steps:

[0054] B1. In a three-necked flask, 23.7 g of 4-pyridinecarboxaldehyde, 21.2 g of 4,4'-azodiphenylamine, and 120 mL of toluene were mixed and stirred until homogeneous. Hydrochloric acid solution (mass fraction 12%) was added dropwise to adjust the pH of the reaction system to ≈5. The apparatus was then heated to 65°C and kept at this temperature for 6 h. After the reaction was completed, the product was purified by column chromatography (benzene / ethyl acetate volume ratio of 4:1). The eluent was removed by rotary evaporation to obtain the initial product.

[0055] B2. In a three-necked flask, 39.1 g of the initial product, 28.3 g of iodomethane, and 150 mL of toluene were mixed and stirred until homogeneous. The apparatus was then heated to 75 °C and refluxed for 8 hours until the reaction was complete. The product was purified by column chromatography (benzene / ethyl acetate volume ratio of 3:1), and the eluent was removed by rotary evaporation to obtain the functional additive.

[0056] Functional polyester fibers are obtained through the following steps:

[0057] After drying, 79g of polyethylene terephthalate was added to a twin-screw extruder along with 4g of antioxidant 1076 and 8g of functional additives. The mixture was then melt-spun in the twin-screw extruder to obtain functional polyester fibers.

[0058] Example 3

[0059] Unlike Example 2, the functional polyester fiber is prepared through the following steps:

[0060] After drying 85g of polyethylene terephthalate, it was added to a twin-screw extruder along with 5g of antioxidant 1076 and 12g of functional additives. The mixture was then melt-spun in the twin-screw extruder to obtain functional polyester fibers.

[0061] Example 4

[0062] The polytetrafluoroethylene microporous breathable membrane is prepared by the following steps:

[0063] 24g of polytetrafluoroethylene resin and 6g of paraffin wax were mixed and extruded through a plunger extruder to obtain a preform. The preform was biaxially stretched to form a microporous structure and then sintered at 340-380℃ to remove the lubricant and stabilize the pore structure, thus obtaining a polytetrafluoroethylene microporous breathable membrane.

[0064] The waterproof and breathable outer layer is prepared through the following steps:

[0065] The functional polyester fibers prepared in Example 1 are combed and stretched to make the fibers more neatly arranged, thereby improving the strength and uniformity of the fibers. Then, a hot-pressing composite process is used to combine the treated functional polyester fibers with a polytetrafluoroethylene microporous breathable membrane, so that the breathable membrane and the fibers are tightly bonded to form a waterproof layer, resulting in a waterproof and breathable outer layer.

[0066] Example 5

[0067] The polytetrafluoroethylene microporous breathable membrane is prepared by the following steps:

[0068] 24g of polytetrafluoroethylene resin and 9g of epoxidized soybean oil were mixed and extruded through a plunger extruder to obtain a preform. The preform was biaxially stretched to form a microporous structure and then sintered at 340-380℃ to remove the lubricant and stabilize the pore structure, thus obtaining a polytetrafluoroethylene microporous breathable membrane.

[0069] The waterproof and breathable outer layer is prepared through the following steps:

[0070] The functional polyester fibers prepared in Example 2 are combed and stretched to make the fiber arrangement more neat, improve the strength and uniformity of the fibers, and then the treated functional polyester fibers are combined with polytetrafluoroethylene microporous breathable membrane by hot pressing composite process, so that the breathable membrane and the fiber are tightly bonded to form a waterproof layer, resulting in a waterproof and breathable outer layer.

[0071] Example 6

[0072] The skin-friendly inner layer is prepared through the following steps:

[0073] Step A1: Open and remove impurities from 43g of long-staple cotton fiber, 21g of modal fiber and 10g of seaweed fiber respectively to improve the purity and spinnability of the fiber and obtain pretreated fiber.

[0074] Step A2: Place the three pretreated fibers into a blending equipment and mix them thoroughly to obtain a skin-friendly inner layer blended fiber.

[0075] Step A3: The blended fibers are spun into yarn through a spinning process, and then the yarn is woven using weaving equipment to obtain a skin-friendly inner layer.

[0076] Example 7

[0077] The skin-friendly inner layer is prepared through the following steps:

[0078] Step A1: Open and remove impurities from 55g of long-staple cotton fiber, 33g of modal fiber and 18g of seaweed fiber respectively to improve the purity and spinnability of the fiber and obtain pretreated fiber.

[0079] Step A2: Place the three pretreated fibers into a blending equipment and mix them thoroughly to obtain a skin-friendly inner layer blended fiber.

[0080] Step A3: The blended fibers are spun into yarn through a spinning process, and then the yarn is woven using weaving equipment to obtain a skin-friendly inner layer.

[0081] Example 8

[0082] A method for preparing a skin-friendly and breathable multifunctional fabric includes the following steps:

[0083] A lamination process was used to laminate the skin-friendly inner layer prepared in Example 6 and the waterproof and breathable outer layer prepared in Example 4. During the lamination process, polyurethane adhesive was used to uniformly coat the bonding surfaces of the skin-friendly inner layer and the waterproof and breathable outer layer. Then, hot pressing was performed using a hot press roller (the hot pressing temperature was controlled at 150°C, the pressure was 0.2 MPa, and the time was 5 seconds) to firmly bond the two fabrics together, forming a double-layer skin-friendly and breathable multifunctional fabric.

[0084] Example 9

[0085] A method for preparing a skin-friendly and breathable multifunctional fabric includes the following steps:

[0086] A lamination process was used to laminate the skin-friendly inner layer prepared in Example 7 and the waterproof and breathable outer layer prepared in Example 5. During the lamination process, polyurethane adhesive was used to uniformly coat the bonding surfaces of the skin-friendly inner layer and the waterproof and breathable outer layer. Then, hot pressing was performed using a hot press roller (the hot pressing temperature was controlled at 170°C, the pressure was 0.4 MPa, and the time was 8 seconds) to firmly bond the two layers of fabric, forming a double-layer skin-friendly and breathable multifunctional fabric.

[0087] Comparative Example 1

[0088] The functional additives in Example 3 were replaced with an equal mass of dodecyl dimethyl benzyl ammonium chloride (which has both antibacterial and antistatic properties), and the remaining steps were the same as in Example 3, to obtain functional polyester fibers.

[0089] Comparative Example 2

[0090] Use ordinary nylon fiber fabric.

[0091] Comparative Example 3

[0092] Use ordinary polyester fiber fabric.

[0093] Fabrics made from the polyester fibers of Examples 1, 2, 3 and Comparative Example 1 were fabricated using a weaving process, and their antibacterial and antistatic properties were tested. The results are shown in Table 1.

[0094] Table 1

[0095]

[0096] As can be seen from Table 1, the functional polyester fibers prepared in Examples 1, 2 and 3 of the present invention have better antibacterial properties than the comparative example, a significantly shorter half-life compared to the comparative example, and better antistatic properties.

[0097] Examples 8 and 9, and Comparative Examples 2 and 3 were tested for skin affinity (only the skin-friendly inner layer was measured) and moisture permeability; the results are shown in Table 2.

[0098] Table 2

[0099]

[0100] As can be seen from Table 2, the fabrics prepared in Examples 8 and 9 of the present invention are more skin-friendly and breathable than those in the comparative example. In summary, the present invention has important application value in the field of multifunctional fabric technology.

[0101] The above description is merely an example and illustration of the present invention. Any modifications or additions made by those skilled in the art to the specific embodiments described, or any substitutions made in a similar manner, should fall within the protection scope of the present invention.

Claims

1. A skin-friendly and breathable multifunctional fabric, comprising a skin-friendly inner layer and a waterproof and breathable outer layer, characterized in that, The waterproof and breathable outer layer is prepared by the following steps: Functional polyester fibers are combed and stretched, and then combined with polytetrafluoroethylene microporous breathable membrane using a hot-pressing composite process to obtain a waterproof and breathable outer layer.

2. The skin-friendly and breathable multifunctional fabric according to claim 1, characterized in that, The functional polyester fiber comprises the following raw materials in parts by weight: 73-85 parts polyethylene terephthalate, 3-5 parts antioxidant, and 4-12 parts functional additives.

3. The multifunctional fabric that is skin-friendly and breathable according to claim 1, characterized in that, The functional additive is prepared through the following steps: B1. Mix 4-pyridinecarboxaldehyde, 4,4'-azodiphenylamine and toluene, stir evenly, adjust the pH of the reaction system to ≈4-5, keep the reaction at 60-65℃ for 4-6 hours, and the reaction is completed to obtain the initial product. B2. Mix the primary product, iodomethane, and toluene, stir until homogeneous, and then reflux at 70-75°C for 6-8 hours. Once the reaction is complete, the functional additive is obtained.

4. The skin-friendly and breathable multifunctional fabric according to claim 3, characterized in that, In step B1, the ratio of 4-pyridinecarboxaldehyde, 4,4'-azodiphenylamine, and toluene is 23.7 g: 21.2 g: 120 mL.

5. The skin-friendly and breathable multifunctional fabric according to claim 3, characterized in that, In step B2, the ratio of the initial product, potassium iodide, and toluene is 39.1 g: 28.3 g: 150 mL.

6. The skin-friendly and breathable multifunctional fabric according to claim 1, characterized in that, The polytetrafluoroethylene microporous breathable membrane is prepared by the following steps: Polytetrafluoroethylene resin is mixed with a lubricant and extruded through a plunger to obtain a preform. The preform is then biaxially stretched to form a microporous structure and sintered to obtain a polytetrafluoroethylene microporous breathable membrane.

7. The skin-friendly and breathable multifunctional fabric according to claim 6, characterized in that, The mass ratio of the polytetrafluoroethylene resin to the lubricant is 8:2-3.

8. The skin-friendly and breathable multifunctional fabric according to claim 2, characterized in that, The antioxidant is one of antioxidant 1010 and antioxidant 1076.

9. A method for preparing a skin-friendly and breathable multifunctional fabric according to any one of claims 1-8, characterized in that, Includes the following steps: The fabric is made by laminating a skin-friendly inner layer and a waterproof and breathable outer layer. During the lamination process, polyurethane adhesive is applied to the bonding surfaces of the skin-friendly inner layer and the waterproof and breathable outer layer. Then, the fabric is hot-pressed together by hot press rollers to form a double-layer skin-friendly and breathable multifunctional fabric.

10. The method for preparing a skin-friendly and breathable multifunctional fabric according to claim 9, characterized in that, The hot pressing temperature is controlled at 150-170℃, the pressure is 0.2-0.4MPa, and the time is 5-8s.

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